qcacmn: Fix kw issue in target_if_reg.c

Pointer wmi_handle is returned from a function may
be NULL and will be dereferenced in another function.
Add sanity checking to return if the pointer is NULL.

Change-Id: I2a38098335dde8d76a04129c06166203aefdd2ec
CRs-Fixed: 2317021

target_if/regulatory/src/target_if_reg.c

@@ -42,6 +42,9 @@ static bool tgt_if_regulatory_is_11d_offloaded(struct wlan_objmgr_psoc
 {
 	wmi_unified_t wmi_handle = get_wmi_unified_hdl_from_psoc(psoc);
 
+	if (!wmi_handle)
+		return false;
+
 	return wmi_service_enabled(wmi_handle,
 				   wmi_service_11d_offload);
 }
@@ -51,6 +54,9 @@ static bool tgt_if_regulatory_is_regdb_offloaded(struct wlan_objmgr_psoc
 {
 	wmi_unified_t wmi_handle = get_wmi_unified_hdl_from_psoc(psoc);
 
+	if (!wmi_handle)
+		return false;
+
 	return wmi_service_enabled(wmi_handle,
 				   wmi_service_regulatory_db);
 }
@@ -60,6 +66,9 @@ static bool tgt_if_regulatory_is_there_serv_ready_extn(struct wlan_objmgr_psoc
 {
 	wmi_unified_t wmi_handle = get_wmi_unified_hdl_from_psoc(psoc);
 
+	if (!wmi_handle)
+		return false;
+
 	return wmi_service_enabled(wmi_handle,
 				   wmi_service_ext_msg);
 }
@@ -264,6 +273,9 @@ static QDF_STATUS tgt_if_regulatory_register_master_list_handler(
 {
 	wmi_unified_t wmi_handle = get_wmi_unified_hdl_from_psoc(psoc);
 
+	if (!wmi_handle)
+		return QDF_STATUS_E_FAILURE;
+
 	return wmi_unified_register_event_handler(wmi_handle,
 					       wmi_reg_chan_list_cc_event_id,
 					       tgt_reg_chan_list_update_handler,
@@ -276,6 +288,9 @@ static QDF_STATUS tgt_if_regulatory_unregister_master_list_handler(
 {
 	wmi_unified_t wmi_handle = get_wmi_unified_hdl_from_psoc(psoc);
 
+	if (!wmi_handle)
+		return QDF_STATUS_E_FAILURE;
+
 	return wmi_unified_unregister_event_handler(wmi_handle,
 					       wmi_reg_chan_list_cc_event_id);
 }
@@ -285,6 +300,9 @@ static QDF_STATUS tgt_if_regulatory_set_country_code(
 {
 	wmi_unified_t wmi_handle = get_wmi_unified_hdl_from_psoc(psoc);
 
+	if (!wmi_handle)
+		return QDF_STATUS_E_FAILURE;
+
 	return wmi_unified_set_country_cmd_send(wmi_handle, arg);
 
 }
@@ -294,6 +312,9 @@ static QDF_STATUS tgt_if_regulatory_set_user_country_code(
 {
 	wmi_unified_t wmi_handle = get_wmi_unified_hdl_from_psoc(psoc);
 
+	if (!wmi_handle)
+		return QDF_STATUS_E_FAILURE;
+
 	if (wmi_unified_set_user_country_code_cmd_send(wmi_handle, pdev_id,
 				rd) != QDF_STATUS_SUCCESS) {
 		target_if_err("Set user country code failed");
@@ -308,6 +329,9 @@ static QDF_STATUS tgt_if_regulatory_register_11d_new_cc_handler(
 {
 	wmi_unified_t wmi_handle = get_wmi_unified_hdl_from_psoc(psoc);
 
+	if (!wmi_handle)
+		return QDF_STATUS_E_FAILURE;
+
 	return wmi_unified_register_event(wmi_handle,
 					  wmi_11d_new_country_event_id,
 					  tgt_reg_11d_new_cc_handler);
@@ -318,6 +342,9 @@ static QDF_STATUS tgt_if_regulatory_unregister_11d_new_cc_handler(
 {
 	wmi_unified_t wmi_handle = get_wmi_unified_hdl_from_psoc(psoc);
 
+	if (!wmi_handle)
+		return QDF_STATUS_E_FAILURE;
+
 	return wmi_unified_unregister_event(wmi_handle,
 					    wmi_11d_new_country_event_id);
 }
@@ -327,6 +354,9 @@ static QDF_STATUS tgt_if_regulatory_register_ch_avoid_event_handler(
 {
 	wmi_unified_t wmi_handle = get_wmi_unified_hdl_from_psoc(psoc);
 
+	if (!wmi_handle)
+		return QDF_STATUS_E_FAILURE;
+
 	return wmi_unified_register_event(wmi_handle,
 					  wmi_wlan_freq_avoid_event_id,
 					  tgt_reg_ch_avoid_event_handler);
@@ -337,6 +367,9 @@ static QDF_STATUS tgt_if_regulatory_unregister_ch_avoid_event_handler(
 {
 	wmi_unified_t wmi_handle = get_wmi_unified_hdl_from_psoc(psoc);
 
+	if (!wmi_handle)
+		return QDF_STATUS_E_FAILURE;
+
 	return wmi_unified_unregister_event(wmi_handle,
 			wmi_wlan_freq_avoid_event_id);
 }
@@ -346,6 +379,9 @@ static QDF_STATUS tgt_if_regulatory_start_11d_scan(
 {
 	wmi_unified_t wmi_handle = get_wmi_unified_hdl_from_psoc(psoc);
 
+	if (!wmi_handle)
+		return QDF_STATUS_E_FAILURE;
+
 	return wmi_unified_send_start_11d_scan_cmd(wmi_handle,
 						   reg_start_11d_scan_req);
 }
@@ -356,6 +392,9 @@ static QDF_STATUS tgt_if_regulatory_stop_11d_scan(
 {
 	wmi_unified_t wmi_handle = get_wmi_unified_hdl_from_psoc(psoc);
 
+	if (!wmi_handle)
+		return QDF_STATUS_E_FAILURE;
+
 	return wmi_unified_send_stop_11d_scan_cmd(wmi_handle,
 						  reg_stop_11d_scan_req);
 }